<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        body {
            /*filter: blur(2);*/

            /*整个网页变灰*/
            /*filter:grayscale(100%);*/
        }
        img{
            /*设置模糊程度*/
            filter:blur(2px);
        }
        img:hover{
            filter: blur(0px);
        }
    </style>
</head>
<body>
<img src="/static/w2/images/car.png">

</body>
</html>